Method of preparation of coupled branched and linear polymer compositions
US6525140B1 · kind B1 · utility
6Cited by
7References
14Claims
0Family size
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Key dates
| Filing date | Mar 23, 2000 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Mar 23, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F297/044
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A continuous process for manufacture of a polymer including branched and linear components comprising first polymerizing conjugated diene(s) in the presence of an organometallic initiator to a conversion that is at least 90% complete. A coupling agent is added to obtain a polymer including branched and linear components. The coupling agent is added at a ratio of about 0.3 to about 0.6 coupling equivalents to initiator equivalents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.